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HomeBackend DevelopmentPHP TutorialImplementation code of ftp upload and download function in php

The content of this article is about the implementation code of the ftp upload and download function in PHP. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.

/**
 * 作用:FTP操作类( 拷贝、移动、删除文件/创建目录 )
 */

class FTP
{
    public $off; // 返回操作状态(成功/失败)
    public $conn_id; // FTP连接
    /**
     * 方法:FTP连接
     * @FTP_HOST -- FTP主机
     * @FTP_PORT -- 端口
     * @FTP_USER -- 用户名
     * @FTP_PASS -- 密码
     */
    const FTP_HOST='xxx.xx.xx.xxx';
    const FTP_PORT='21';
    const FTP_USER='xx';
    const FTP_PASS='xxxx';

    function __construct()
    {
        $this->conn_id = @ftp_connect(self::FTP_HOST,self::FTP_PORT) or die("FTP服务器连接失败");
        @ftp_login($this->conn_id,self::FTP_USER,self::FTP_PASS) or die("FTP服务器登陆失败");
        @ftp_pasv($this->conn_id,1); // 打开被动模拟
    }
    /**
     * 方法:上传文件
     * @path -- 本地路径
     * @newpath -- 上传路径
     * @type -- 若目标目录不存在则新建
     */
    function up_file($path,$newpath,$type=true)
    {
        if($type) $this->dir_mkdirs($newpath);
        $this->off = @ftp_put($this->conn_id,$newpath,$path,FTP_BINARY);
        if(!$this->off) echo "文件上传失败,请检查权限及路径是否正确!";
    }
    /**
     * 方法:移动文件
     * @path -- 原路径
     * @newpath -- 新路径
     * @type -- 若目标目录不存在则新建
     */
    function move_file($path,$newpath,$type=true)
    {
        if($type) $this->dir_mkdirs($newpath);
        $this->off = @ftp_rename($this->conn_id,$path,$newpath);
        if(!$this->off) echo "文件移动失败,请检查权限及原路径是否正确!";
    }
    /**
     * 方法:复制文件
     * 说明:由于FTP无复制命令,本方法变通操作为:下载后再上传到新的路径
     * @path -- 原路径
     * @newpath -- 新路径
     * @type -- 若目标目录不存在则新建
     */
    function copy_file($path,$newpath,$type=true)
    {
        $downpath = "c:/tmp.dat";
        $this->off = @ftp_get($this->conn_id,$downpath,$path,FTP_BINARY);// 下载
        if(!$this->off) echo "文件复制失败,请检查权限及原路径是否正确!";
        $this->up_file($downpath,$newpath,$type);
    }
    /**
     * 方法:删除文件
     * @path -- 路径
     */
    function del_file($path)
    {
        $this->off = @ftp_delete($this->conn_id,$path);
        return $this->off;
    }
    /**
     * 方法:生成目录
     * @path -- 路径
     */
    function dir_mkdirs($path)
    {
        $path_arr = explode('/',$path); // 取目录数组
        $file_name = array_pop($path_arr); // 弹出文件名
        $path_p = count($path_arr); // 取层数
        foreach($path_arr as $val) // 创建目录
        {
            if(@ftp_chdir($this->conn_id,$val) == FALSE)
            {
                $tmp = @ftp_mkdir($this->conn_id,$val);
                if($tmp == FALSE)
                {
                    echo "目录创建失败,请检查权限及路径是否正确!";
                    exit;
                }
                @ftp_chdir($this->conn_id,$val);
            }
        }
        for($i=1;$i<=$path_p;$i++)         // 回退到根
        {
            @ftp_cdup($this->conn_id);
        }
    }

    /*
     * 文件下载
     */
    function download($select_file)
    {
        $tmpfile = tempnam( getcwd()."/", "temp" );    // 创建唯一的临时文件
        if(ftp_get($this->conn_id, $tmpfile, $select_file, FTP_BINARY)) {    // 下载指定的文件到临时文件
            $this->close();    // 关闭连接
            $file = explode(&#39;/&#39;,$select_file);
            $file = end($file);
            header("content-type: application/octet-stream");
            header("content-disposition: attachment; filename=" . $file);//content-disposition:inline; 表示可以在线打开文件!
          readfile($tmpfile);
          unlink($tmpfile);    // 删除临时文件
          exit;
        }
        unlink($tmpfile);
    }

    /**
     * 方法:关闭FTP连接
     */
    function close()
    {
        @ftp_close($this->conn_id);
    }
}


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